如何修复Discord天气Bot中的时间偏移问题？

我用下面的Discord Bot代码调用OpenWeatherMap API获取未来24小时天气，代码能正常运行返回结果，但返回的时间比对应温度的实际时间超前6小时（把示例输出里的时间回调6小时后，温度才符合实际情况），该怎么修复？

import requests
import discord

def get_weather(city, state, api_key):
    base_url = "http://api.openweathermap.org/data/2.5/forecast"
    params = {
        "q": f"{city},{state}",
        "appid": api_key,
        "units": "imperial",
        "cnt": 9
    }

    response = requests.get(base_url, params=params)
    data = response.json()

    # Check if the API request was successful
    if response.status_code == 200:
        # Extract and format the weather information
        weather_info = []
        for forecast in data['list']:
            date_time = forecast['dt_txt']
            temperature = forecast['main']['temp']
            weather_description = forecast['weather'][0]['description']
            weather_info.append(f"{date_time}: {temperature}°F, {weather_description}")

        return weather_info
    else:
        return f"Error: {data['message']}"

api_key = ''
bot_token = ''
intents = discord.Intents.default()
intents.message_content = True

client = discord.Client(intents=intents)

@client.event
async def on_ready():
    print(f"We have logged in as {client.user}")

@client.event
async def on_message(message):
    if message.author == client.user:
        return

    if message.content.startswith("!weather"):
        await message.channel.send("Enter the state: ")

        def check_state(m):
            return m.author == message.author and m.channel == message.channel

        state_msg = await client.wait_for("message", check=check_state, timeout=60)
        state = state_msg.content

        await message.channel.send("Enter the city: ")

        def check_city(m):
            return m.author == message.author and m.channel == message.channel

        city_msg = await client.wait_for("message", check=check_city, timeout=60)
        city = city_msg.content

        weather_info = get_weather(city, state, api_key)

        if isinstance(weather_info, str):
            await message.channel.send(weather_info)
        else:
            await message.channel.send("\n".join(weather_info))

client.run(bot_token)

返回结果示例：

2023-07-05 00:00:00: 81.46°F, light rain
2023-07-05 03:00:00: 77.63°F, few clouds
2023-07-05 06:00:00: 72.77°F, clear sky
2023-07-05 09:00:00: 70.63°F, clear sky
2023-07-05 12:00:00: 76.95°F, clear sky
2023-07-05 15:00:00: 87.58°F, clear sky
2023-07-05 18:00:00: 93.49°F, few clouds
2023-07-05 21:00:00: 92.32°F, broken clouds
2023-07-06 00:00:00: 82.67°F, broken clouds

问题根源是OpenWeatherMap返回的dt_txt字段是UTC标准时间，而你需要的是目标城市的本地时间。推荐以下两种修复方式：

方式一：利用API返回的时区偏移自动转换（最优解） #

API返回的city字段中包含timezone值（单位为秒），代表目标城市与UTC的时间偏移量。我们可以用这个值将UTC时间转换为本地时间，适配所有时区的城市。

修改后的完整代码如下：

import requests
import discord
from datetime import datetime, timedelta  # 导入时间处理模块

def get_weather(city, state, api_key):
    base_url = "http://api.openweathermap.org/data/2.5/forecast"
    params = {
        "q": f"{city},{state}",
        "appid": api_key,
        "units": "imperial",
        "cnt": 9
    }

    response = requests.get(base_url, params=params)
    data = response.json()

    if response.status_code == 200:
        weather_info = []
        # 获取目标城市的时区偏移（秒）
        timezone_offset = data['city']['timezone']
        for forecast in data['list']:
            # 解析UTC时间字符串
            utc_time = datetime.strptime(forecast['dt_txt'], "%Y-%m-%d %H:%M:%S")
            # 转换为本地时间：UTC时间 + 时区偏移量
            local_time = utc_time + timedelta(seconds=timezone_offset)
            # 格式化本地时间为字符串
            local_time_str = local_time.strftime("%Y-%m-%d %H:%M:%S")
            
            temperature = forecast['main']['temp']
            weather_description = forecast['weather'][0]['description']
            weather_info.append(f"{local_time_str}: {temperature}°F, {weather_description}")

        return weather_info
    else:
        return f"Error: {data['message']}"

# 以下代码保持不变
api_key = ''
bot_token = ''
intents = discord.Intents.default()
intents.message_content = True

client = discord.Client(intents=intents)

@client.event
async def on_ready():
    print(f"We have logged in as {client.user}")

@client.event
async def on_message(message):
    if message.author == client.user:
        return

    if message.content.startswith("!weather"):
        await message.channel.send("Enter the state: ")

        def check_state(m):
            return m.author == message.author and m.channel == message.channel

        state_msg = await client.wait_for("message", check=check_state, timeout=60)
        state = state_msg.content

        await message.channel.send("Enter the city: ")

        def check_city(m):
            return m.author == message.author and m.channel == message.channel

        city_msg = await client.wait_for("message", check=check_city, timeout=60)
        city = city_msg.content

        weather_info = get_weather(city, state, api_key)

        if isinstance(weather_info, str):
            await message.channel.send(weather_info)
        else:
            await message.channel.send("\n".join(weather_info))

client.run(bot_token)

方式二：手动固定偏移（仅临时应急） #

如果只是临时针对当前6小时的偏移场景，可以直接给UTC时间减去6小时，但这种方法不通用，换其他时区的城市就会失效：

# 在处理时间的部分替换为以下代码
utc_time = datetime.strptime(forecast['dt_txt'], "%Y-%m-%d %H:%M:%S")
local_time = utc_time - timedelta(hours=6)
local_time_str = local_time.strftime("%Y-%m-%d %H:%M:%S")

关键说明 #

• 方式一通过API返回的timezone字段自动适配时区，是通用且正确的解决方案。
• 必须导入datetime和timedelta模块来完成时间解析与转换操作。

内容的提问来源于stack exchange，提问作者Ali Eke